Home / 12,261.18-16,920.99-9,431.58

Finding the Fourth Proportional to 12,261.18, 16,920.99 and 9,431.58

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Solution

The fourth proportional to 12,261.18, 16,920.99 and 9,431.58 is: 13,016.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.18 : 16,920.99 = 9,431.58 : x
  2. Step 2: Convert to fraction form
    12,261.18/16,920.99 = 9,431.58/x
  3. Step 3: Cross multiply
    12,261.18x = 16,920.99 × 9,431.58
  4. Step 4: Simplify right side
    12,261.18x = 159,591,670.86
  5. Step 5: Solve for x
    x = 159,591,670.86/12,261.18
  6. Step 6: Final answer
    x = 13,016.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.